#include<bits/stdc++.h>
using namespace std;
inline int read(){
    int x=0,y=1;
    char c=getchar();
    while(c<'0'||c>'9') y=-1,c=getchar();
    while(c>='0'&&c<='9') x=x*10+c-'0',c=getchar();
    return x*y;
}
int main(){
    ios::sync_with_stdio();
    cin.tie(),cout.tie();
    freopen("arena.in","r",stdin);
    freopen("arena.out","w",stdout);
}

